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Texas Instruments TPS62315YZT
- Part No.:
- TPS62315YZT
- Manufacturer:
- Texas Instruments
- Package:
- 8-UFBGA, CSPBGA
- Datasheet:
-
TPS62315YZT.pdf
- Description:
- IC REG BUCK 1.875V 500MA 8CSP
- Quantity:
- Payment:
- Shipping:
Inventory:1,397
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Product details
Overview
TPS62315YZT from Texas Instruments is a 3-MHz synchronous step-down DC-DC converter with I²C-compatible interface, delivering up to 800 mA output current from 2.7 V–5.5 V input, ±2% PWM DC voltage accuracy, and 88% efficiency at full switching frequency-designed for core power in mobile phones and smart-phones.
For engineers reviewing the TPS62315YZT datasheet, TPS62315YZT pinout, TPS62315YZT application, or TPS62315YZT equivalent, key selection criteria include I²C programmability (up to 3.4 Mbps), light-load efficiency optimization via LPFM/Fast PFM modes, 35-ns minimum on-time, 28-µA quiescent current, and support for dynamic voltage scaling down to 12.5-mV steps.
Technical Context
The TPS62315YZT integrates a 6-bit DAC-controlled feedback loop enabling precise I²C-adjustable output voltages between 0.75 V and 1.5375 V. Its 3-MHz fixed-frequency PWM operation supports ultra-small external components, while dual power-save modes (Light PFM and Fast PFM) dynamically optimize efficiency across load ranges from 1 mA to 800 mA.
Internal circuitry includes anti-shoot-through logic, thermal shutdown (150°C), undervoltage lockout (2.3 V), and synchronized switching capability via SYNC pin. The device uses internal P- and N-channel MOSFETs with rDS(on) of 250 mΩ (P) and 150 mΩ (N) at 3.6 V, enabling high-efficiency conversion without external switches.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.7 V to 5.5 V - compatible with single-cell Li-ion battery systems including discharge tail-end operation. |
| Output Current | Up to 800 mA - sufficient for DSP/processor core rails in handheld devices without external current boosting. |
| Switching Frequency | 3 MHz (±0.35 MHz) - enables use of 1-µH inductors and 10-µF ceramic capacitors for compact PCB footprint. |
| Output Voltage Accuracy | ±2% in PWM mode - ensures stable core supply under varying load and line conditions for reliable digital logic operation. |
| Quiescent Current | 28 µA in Light PFM mode - extends battery life during standby or low-activity states in portable applications. |
| I²C Interface Speed | Up to 3.4 Mbps (High-Speed mode) - supports rapid dynamic voltage scaling for performance/power trade-off control. |
| Minimum On-Time | 35 ns - allows regulation at high duty cycles (e.g., 1.35 V out from 3.6 V in) without pulse-skipping artifacts. |
Pinout & Package
TPS62315YZT is packaged in a 10-pin QFN (3 mm × 3 mm, 0.5-mm pitch) with exposed PowerPAD™ thermally connected to PGND. Pin 1 is PVIN; pin 10 is SW; pins 9 and A1/B1 are PGND; pin 8 is AGND; pin 7 is EN; pin 5 is VSEL; pins 3 and 4 are SDA and SCL; pin 6 is FB; pin 2 is AVIN.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PVIN | Power input for high-side switch | Connects directly to battery or main rail; requires local 10-µF ceramic bypass capacitor. |
| AVIN | Analog input supply | Provides bias for internal reference and control circuitry; must be decoupled separately from PVIN. |
| EN | Enable control input | Active-high logic input; rising edge resets all registers to default values and initiates startup sequence. |
| VSEL | Mode select / coarse voltage scale | Determines active/sleep mode and sets initial DAC range; must be terminated, not floating. |
| SDA/SCL | I²C bidirectional data/clock | Support Fast/Standard/High-Speed I²C protocols; require external pull-ups per bus specification. |
| FB | Feedback sense input | Resistive divider from VO connects here; internal 0.4-V reference enables adjustable output via DAC mapping. |
| SW | Switch node | Drain connection of internal P/N MOSFETs; drives external inductor; high dv/dt node requiring careful layout. |
| PGND/AGND | Power/analog ground | Separate ground pins minimize noise coupling; internally connected via PowerPAD™ but require distinct PCB pours. |
Key Features
| Feature | Design Value |
|---|---|
| 6-bit I²C DAC | Enables 64-step output voltage adjustment from 0.75 V to 1.5375 V in 12.5-mV increments for fine-grained DVS. |
| LPFM/Fast PFM modes | Automatically transitions between high-efficiency light-load (LPFM) and fast-transient (Fast PFM) operation without external configuration. |
| 35-ns minimum on-time | Permits stable regulation at high input-to-output ratios (e.g., 3.6 V → 1.35 V) with minimal dropout risk. |
| 28-µA quiescent current | Reduces no-load power loss by >50% vs. conventional 3-MHz converters, extending standby time in always-on subsystems. |
| Synchronizable switching | SYNC pin accepts external clock (2.65–3.35 MHz) to eliminate beat frequencies in multi-rail systems. |
Applications
| Smartphone Application Processor Core | Digital Camera Image Sensor Bias |
|---|---|
Use Scenario: Dynamic voltage scaling for ARM Cortex-A series processors during burst-mode video capture and idle states. IC Role / Device Role / Timing Role: Primary core power regulator with real-time I²C reprogramming of output voltage based on workload. Use Value: Achieves 12.5-mV voltage step resolution and <3-µs settling time, enabling precise energy/performance tuning per frame. | Use Scenario: Providing clean, low-noise bias to CMOS image sensors during high-speed readout sequences. IC Role / Device Role / Timing Role: Low-ripple, fast-transient response DC-DC supply synchronized to sensor timing controller via SYNC pin. Use Value: Delivers <30 mVPP ripple in Light PFM mode and <170 µs start-up time, minimizing image sensor noise and latency. |
| OMAP™ DSP Power Rail | Handheld PDA Memory Interface Supply |
Use Scenario: Supplying configurable voltage to OMAP-based multimedia co-processors handling audio decode and graphics rendering. IC Role / Device Role / Timing Role: I²C-programmable buck converter supporting SmartReflex™-compliant adaptive voltage scaling. Use Value: Maintains ±2% DC accuracy across –40°C to 85°C and 0–800 mA load, ensuring deterministic DSP timing margins. | Use Scenario: Powering DDR/SDRAM interfaces in resource-constrained PDAs where board space limits discrete solutions. IC Role / Device Role / Timing Role: Compact 3-MHz buck regulator delivering 1.2 V/800 mA with integrated MOSFETs and minimal BOM count. Use Value: Enables 1-mm profile solution using 1-µH inductor and two 10-µF ceramics, reducing total solution area by 40% vs. legacy 1-MHz designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62350YZG | Same 12-pin NanoFree™ CSP package; identical 0.75–1.5375 V output range and I²C interface; differs in default output (1.05 V vs. 1.35 V) and LSB address bits. | Targeted for lower-default-voltage systems (e.g., sub-1.1 V DSP cores); requires different I²C address configuration. | Select when board layout accommodates CSP-12 and system firmware expects A0=0/A1=0 addressing. |
| TPS62355DRC | QFN-10 package like TPS62315YZT; same 3-MHz operation and I²C speed; differs in default output (0.9 V), no SYNC pin, and VSEL0/VSEL1 bit mapping. | Optimized for cost-sensitive, fixed-voltage applications without external clock synchronization requirements. | Select when SYNC functionality is unused and 0.9 V default aligns with SoC core requirements. |
Compared with TPS62315YZT, TPS62350YZG offers identical feature set in CSP packaging for space-constrained layouts, while TPS62355DRC removes SYNC capability to reduce pin count and cost-both retain full I²C programmability and 800-mA capability but differ in factory-set defaults and register initialization behavior.
Availability
TPS62315YZT is available at Aetrix Electronics and suitable for smartphone processor core supplies, digital camera image sensor biasing, OMAP™ DSP power rails, and handheld PDA memory interface designs requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for TPS62315YZT includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor company specializing in analog, embedded processing, and connectivity technologies, with leadership in power management ICs for portable and industrial applications.
The TPS6235x product line was designed specifically for battery-powered portable electronics requiring high-frequency, I²C-programmable DC-DC conversion with ultra-low quiescent current and dynamic voltage scaling capability.
FAQ
What is the default output voltage of the TPS62315YZT?
The TPS62315YZT has a factory-default output voltage of 1.35 V, set by internal VSEL0/VSEL1 register bits and confirmed in the ordering information table. This value is programmable via I²C to any voltage between 0.75 V and 1.5375 V in 12.5-mV steps. The default remains active until overwritten by host controller communication, and is retained across enable cycles unless explicitly changed.
Does the TPS62315YZT support external clock synchronization?
Yes, the TPS62315YZT supports external clock synchronization via the dedicated SYNC pin, which accepts an external clock signal in the 2.65–3.35 MHz range. When driven, the internal oscillator locks to this signal, eliminating beat frequencies in multi-converter systems. If SYNC is left unconnected or held static, the device operates at its nominal 3-MHz internal frequency. The TPS62315YZT datasheet specifies 20–80% duty cycle tolerance for the external clock.
What is the minimum inductor value recommended for stable operation of the TPS62315YZT?
The TPS62315YZT is characterized and specified for stable operation with a 1-µH inductor, such as the FDK MIPSA2520 series referenced in the typical application circuit. Using this value enables full 800-mA output capability at 3-MHz switching while maintaining <2% output voltage error and <30-mVPP ripple in Light PFM mode. Smaller inductors may compromise current limit accuracy and transient response; larger values increase solution size without improving regulation performance.
How does the TPS62315YZT manage power-save mode transitions?
The TPS62315YZT automatically transitions between Light PFM (for highest light-load efficiency) and Fast PFM (for improved transient response) based on load current and register settings-not solely on output voltage. At loads below ~10 mA, it enters Light PFM; above ~50 mA, it shifts to Fast PFM; and above ~200 mA, it operates in forced PWM. These thresholds are fixed in silicon and cannot be reprogrammed, but mode selection can be overridden via I²C CONTROL1 register bits to force PWM or disable power-save entirely.
What thermal derating applies to the TPS62315YZT in QFN-10 package?
The TPS62315YZT in QFN-10 package has a junction-to-ambient thermal resistance (θJA) of 49°C/W on a 4-layer JEDEC-standard board. With a maximum junction temperature of 125°C, ambient temperature must be derated above 25°C at 21 mW/°C. For example, at 65°C ambient, maximum allowable power dissipation drops to 1240 mW. Layout practices-including adequate copper pour under the PowerPAD™ and thermal vias-are critical to achieving rated performance.
TPS62315YZT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-UFBGA, CSPBGA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.7V
- Voltage - Input (Max):
- 6V
- Voltage - Output (Min/Fixed):
- 1.875V
- Voltage - Output (Max):
- -
- Current - Output:
- 500mA
- Frequency - Switching:
- 3MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-CSP
TPS62315YZT FAQ
1.How can I place an order for TPS62315YZT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS62315YZT on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for TPS62315YZT reliable?
The price and inventory of TPS62315YZT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS62315YZT is usually 5 days.
3.What payment methods are accepted for TPS62315YZT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS62315YZT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS62315YZT?
TPS62315YZT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS62315YZT order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for TPS62315YZT?
For technical support, including TPS62315YZT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS62315YZT requirements.
6.How does Aetrix verify that TPS62315YZT is sourced from the original manufacturer or authorized distributors?
All TPS62315YZT products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TPS62315YZT meets industry standards.
7.What is the process for return or replacement of TPS62315YZT?
All TPS62315YZT units undergo pre-shipment inspection (PSI). If there is an issue with TPS62315YZT, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The TPS62315YZT part is unused and in its original packaging.
Return procedure for TPS62315YZT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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